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BELL SYSTEM TECHNICAL JOURNAL 





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Fie. 22— These five frames show the angle monitoring pattern when a local signal 

 is u=ed to simulate a wave. The bottom frame shows the ideal MUSA pattern tor 

 one wave. The remaining frames show the effect of reducing the number of antennas 

 from six (1-2-3-4-5-6) to five (2-3-4-5-6) to four (3-4-5-6) to three (4-5-6) to two (5-6) 

 These films were taken before the amplitude tapering was introduced, laperea 

 amplitudes reduce the minor lobes to about half of the amplitudes shown. 



